Shooting from the hip

Whenever I’m out wandering the streets in a city I try to get a few shots like this. I use a wide angle lens and hold it vertical at my side, as if I am just carrying it one handed. I set the camera to full auto focus and as I walk past someone interesting I hold down the shutter and take a couple of frames. It’s a very hit and miss technique, people generally don’t notice so you can get some good candid shots.